David and Mary Sturgeon of Bleary, Co. Down had son William baptized Sept 7, 1846 at St Matthias, Knocknamuckley, Co Armagh.
John Sturgeon who married Jane Clark lived in nearby in Ballydougan, Co. Down and he and David had father David Sturgeon. This town is classified as Waringstown or Donaghcloney depending on the transcribers and births are registered in Lurgan.
There are several Sturgeons in the immediate area going to Knocknamuckley. Samuel and Frances Sturgeon of Ballydougan have Mary Jane in 1850; Richard and Mary have children starting with Hiram in 1845, then Mary Jane and Hannah. William and ELiza have Wm 1850 in Bleary, John and Mary Ann have John 1839 Ballydougan, James and Mary have Mary Ann 1839 Ballydougan, Francis and Sarah have Nancy in 1846, James and Mary have William in Ballynagarrick in 1848.
The David Sturgeon b. 1844 m. Sarah Whiteside also had a David as a father, but they seem to live slightly farther away.
I don't see any Samuels being baptized at that particular church in the 1850's.